Clarissa, that course is in the Serbian language unfortunately.
If you are interested in writing professional blogs for clients, I suggest HubSpot’s Content marketing course. It is quite demanding though if you haven’t taken any course yet.
For basics on Medium/personal blogging, check out my posts about writing.
If you are interested in writing a book/blog posts about your life, subscribe to Marion Roach Smith’s emails (former NY Times staffer). She offers her help in how to write a memoir.